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The shutter speed is a measure of how long how film or sensor is exposed to light, due to the shutter being opened and closed. This is usually measured in seconds, or fractions of a second. Longer shutter speeds allow more light to onto the film or sensor and allow more subject movement.

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How to test if the shutter of a Canonet QL-17 is still working?

I want to get into analog photography and want to check if my dad's old Canon still works; especially if the shutter is still in working order (as that model seems to suffer from sticky shutter blades …